This cooking resource has a selection of kitchen and cooking calculators for converting weights, volumes, metric and bar drinks.
This document is provided by New Mexico State University, a 4 page list of ingredient substitutes.
A cooking encyclopedia that covers thousands of ingredients and kitchen tools. Entries include descriptions, synonyms, pronunciations and suggested substitutions.
It's incredibly frustrating learning new measures, for cooking or even buying clothes.
Don't buy English mustard expecting it to be like French's American Mustard, it's hot and it'll blow your head off.